Chlorofluoromethane
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| General | ||||||||||||||||
| Surname | Chlorofluoromethane | |||||||||||||||
| other names |
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| Molecular formula | CH 2 ClF | |||||||||||||||
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| properties | ||||||||||||||||
| Molar mass | 68.48 g mol −1 | |||||||||||||||
| Physical state |
gaseous |
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| density |
2.85 kg m −3 |
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| Melting point |
−133 ° C |
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| boiling point |
−9 ° C |
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| safety instructions | ||||||||||||||||
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| MAK |
Switzerland: 0.5 ml m −3 or 1.4 mg m −3 |
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| As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . | ||||||||||||||||
Chlorofluoromethane ( Freon 31, HCFC 31 ) is a chemical compound from the group of chlorofluorocarbons or dihalomethanes .
Occurrence
Chlorofluoromethane occurs in traces in the higher atmosphere; 148 ppt were measured at an altitude of 22 km.
properties
As a solid, chlorofluoromethane has a monoclinic crystal structure of the space group P 2 1 (space group no. 4) and the lattice constants a = 6.7676, b = 4.1477, c = 5.0206 (.10 −1 nm), β = 108.205 °.
use
Chlorofluoromethane was used as a refrigerant . It is listed in the Montreal Protocol as a substance that depletes the ozone layer .
safety instructions
Chlorofluoromethane is classified as a category 2 carcinogen.
Individual evidence
- ↑ a b c d Entry on chlorofluoromethane in the GESTIS substance database of the IFA , accessed on April 24, 2017(JavaScript required) .
- ↑ There is not yet a harmonized classification for this substance . A labeling of chlorofluoromethane in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), which was accessed on February 27, 2018, is reproduced from a self-classification by the distributor .
- ↑ Swiss Accident Insurance Fund (Suva): Limit values - current MAK and BAT values (search for 593-70-4 or chlorofluoromethane ), accessed on November 2, 2015.
- ↑ C. Lippens et al .: Atmospheric nitric acid and chlorofluoromethane 11 from interferometric spectra obtained at the Observatoire du Pic du Midi . In: Journal of Optics . 12, No. 5, September 1981, pp. 331-336. doi : 10.1088 / 0150-536X / 12/5/007 .
- ↑ Binbrek OS, Torrie BH, Swainson IP: Neutron powder-profile study of chlorofluoromethane . In: Acta Crystallographica C . 58, No. 11, 2002, pp. 672-674. doi : 10.1107 / S0108270102017328 . PMID 12415178 .
- ↑ Handbook for the Montreal Protocol on Substances that Deplete the Ozone Layer - 7th Edition (2006), Annex C: Controlled substances. (No longer available online.) Archived from the original on July 20, 2008 ; Retrieved July 22, 2008 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
Web links
Commons : Chlorofluoromethane - Collection of pictures, videos and audio files
- Thermodynamic values at chemnet.ru
- Infrared spectrum of chlorofluoromethane (PDF file; 239 kB)
- IARC Summaries & Evaluations: Vol. 41 (1986) , Vol. 71 (1999)